21 Mattison Road, Hornsey, London, N4 1BG

1. 15 Sep 2026

   Received by Haringey

2. 4 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 10 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Haringey took a median of 55 days over the applications it decided in the last year.

This application is with Haringey for determination, against a statutory target of eight weeks. Over the last year Haringey decided householder applications in a median of 56 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• Flat B, 33 Mattison Road, Hornsey, London, N4 1BG

  HGY/2026/0414 Submitted 16 Feb 2026 50 yards away

  Formation of rear dormer and outrigger roof extension with two rooflights to front elevation

  Granted Full applications Extension Loft or dormer 18 docs

• Flat B, 32, Mattison Road, London, N4 1BD

  HGY/2021/1634 Submitted 25 May 2021 50 yards away

  Loft conversion with rear dormer extension (AMENDED DESCRIPTION)

  Granted Full applications Extension Loft or dormer 10 docs

• 9 Duckett Road, Hornsey, London, N4 1BJ

  HGY/2023/0052 Submitted 9 Jan 2023 50 yards away

  Replacement of two existing ground floor Windows on the rear elevation with glazed doors; the replacement of one existing ground floor Window on the side elevation with a glazed fixed panel; and the addition of a cast iron staircase to rear elevation.

  Granted Lawful development Windows or glazing 6 docs

• Ground Floor Flat B, 45 Duckett Road, Hornsey, London, N4 1BJ

  HGY/2024/2395 Submitted 30 Aug 2024 50 yards away

  Certificate of lawfulness for the existing use as dwellinghouse within Use Class C3(C)

  Refused Lawful development 6 docs
  Domestic

• 10 Duckett Road, Hornsey, London, N4 1BN

  HGY/2024/2482 Submitted 9 Sep 2024 100 yards away

  Replacement of existing timber windows and rear door with uPVC units

  Granted Full applications Windows or glazing 12 docs

• 20 Duckett Road, Hornsey, London, N4 1BN

  HGY/2025/3360 Submitted 3 Dec 2025 100 yards away

  Replacement of existing timber windows with modern double glazed uPVC units.

  Granted Full applications Windows or glazing 11 docs

• HGY/2026/1799 Awaiting decision

  14 Kingsley Place, Hornsey, London, N6 5EA

  The installation of 20 x 460W solar panels on the flat roof of 14 Kingsley Place, together with the routing of external heat-pump pipework over the flat roof.

  Received 8 Oct, published by the council 11 Oct 2026 Householder
• HGY/2026/1048 Granted

  18 Muswell Avenue, Hornsey, London, N10 2EG

  Erection of a single storey lower ground floor rear extension with roof terrace and associated landscaping works, insertion of rear ground floor door to proposed terrace, alterations and replacement of rear dormer glazing and first floor rear window, and alterations to front garage door and lower ground window.

  Received 15 May, published by the council 24 Jul 2026 Householder
• HGY/2026/2213 Awaiting decision

  2 Parkwood Mews, Hornsey, London, N6 5UR

  Convert the basement into a basement flat (retrospective application).

  Received 5 Oct, published by the council 11 Oct 2026 Householder
• HGY/2026/2541 Awaiting decision

  132 Vartry Road, Tottenham, London, N15 6HA

  Erection of a single storey rear/side extension, together with the installation of a Sukkah roof

  Received 5 Oct, published by the council 11 Oct 2026 Householder
• HGY/2026/2240 Granted

  40 Cholmeley Park, Hornsey, London, N6 5ER

  Installation of a new painted timber sash window to the existing side dormer on the north elevation of the property at second floor level.

  Received 10 Aug, published by the council 31 Aug 2026 Householder